Finding the Third Proportional to 213,860 and 298,988

Step by Step Solution

1. Step 1: Write the proportion equation
   213,860 : 298,988 = 298,988 : x
2. Step 2: Convert to fraction form
   213,860/298,988 = 298,988/x
3. Step 3: Cross multiply
   213,860x = 298,988 × 298,988
4. Step 4: Simplify right side
   213,860x = 89,393,824,144
5. Step 5: Solve for x
   x = 89,393,824,144/213,860
6. Step 6: Final answer
   x = 418,001.61